<!DOCTYPE html>
<meta charset=utf-8>
<meta name="timeout" content="long">
<title>HTMLImageElement.prototype.decode(), picture tests.</title>
<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
<link rel=help href="https://html.spec.whatwg.org/multipage/embedded-content.html#dom-img-decode">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>

<picture>
<source srcset="/images/green.png">
<source srcset="/images/blue.png">
<img id="testimg">
</picture>

<script>
"use strict";

promise_test(function() {
  var picture = document.createElement("picture");
  var source = document.createElement("source");
  var img = document.createElement("img");

  picture.appendChild(source);
  picture.appendChild(img);

  source.srcset = "/images/green.png";

  return img.decode().then(function(arg) {
    assert_equals(arg, undefined);
  });
}, document.title + " Image with PNG source decodes with undefined.");

promise_test(function() {
  var img = document.getElementById("testimg");
  return img.decode().then(function(arg) {
    assert_equals(arg, undefined);
  });
}, document.title + " Image with multiple sources decodes with undefined.");

promise_test(function() {
  var picture = document.createElement("picture");
  var source = document.createElement("source");
  var img = document.createElement("img");

  picture.appendChild(source);
  picture.appendChild(img);

  source.srcset = "" +
                  "AAD91JpzAAAACXBIWXMAAAsTAAALEwEAmpwYAAAAB3RJTUUH4QUSEioKsy" +
                  "AgywAAABl0RVh0Q29tbWVudABDcmVhdGVkIHdpdGggR0lNUFeBDhcAAAAW" +
                  "SURBVAjXY9y3bx8DAwPL58+fGRgYACktBRltLfebAAAAAElFTkSuQmCC";

  return img.decode().then(function(arg) {
    assert_equals(arg, undefined);
  });
}, document.title + " Image with PNG data URL source decodes with undefined.");

promise_test(function() {
  var picture = document.createElement("picture");
  var source = document.createElement("source");
  var img = document.createElement("img");

  picture.appendChild(source);
  picture.appendChild(img);

  source.srcset = "/images/green.svg";

  return img.decode().then(function(arg) {
    assert_equals(arg, undefined);
  });
}, document.title + " Image with SVG source decodes with undefined.");

promise_test(function(t) {
  var picture = document.createElement("picture");
  var source = document.createElement("source");
  var img = document.createElement("img");

  picture.appendChild(source);
  picture.appendChild(img);

  source.srcset = "/non/existent/path.png";

  var promise = img.decode();
  return promise_rejects_dom(t, "EncodingError", promise);
}, document.title + " Non-existent source fails decode.");

promise_test(function(t) {
  var picture = document.createElement("picture");
  var source = document.createElement("source");
  var img = document.createElement("img");

  picture.appendChild(source);
  picture.appendChild(img);

  source.srcset = "";

  var promise = img.decode();
  return promise_rejects_dom(t, "EncodingError", promise);
}, document.title + " Corrupt image in src fails decode.");

promise_test(function(t) {
  var picture = document.createElement("picture");
  var source = document.createElement("source");
  var img = document.createElement("img");

  picture.appendChild(source);
  picture.appendChild(img);

  var promise = img.decode();
  return promise_rejects_dom(t, "EncodingError", promise);
}, document.title + " Image without srcset fails decode.");

promise_test(function() {
  var picture = document.createElement("picture");
  var source = document.createElement("source");
  var img = document.createElement("img");

  picture.appendChild(source);
  picture.appendChild(img);

  source.srcset = "/images/green.png";

  var first_promise = img.decode();
  var second_promise = img.decode();
  assert_not_equals(first_promise, second_promise);
  return Promise.all([
    first_promise,
    second_promise
  ]);
}, document.title + " Multiple decodes for images with src succeed.");

</script>
